A common problem with stone and faux stone veneer on retaining walls is a buildup of Efflorescence. This is the white substance that comes to the surface of the stone after a water source has seeped through. Here are some tips to help remove this buildup from your stone surfaces and how to prevent this unsightly buildup from happening again.
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Brushing:
Using a strong brush, you can remove efflorescence with ease. Efflorescence is water soluble, so it may disappear through natural weathering, but if you are looking for a faster solution, brush off the stone.
Pressure Washing:
Using pressurized water will help dissolve efflorescence quickly but make sure to dry off affected surfaces properly afterward to prevent the crystals that may remain from reforming the substance.
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Diluted Vinegar:
This natural substance is an easy fix for removing efflorescence. It is much less harmful than industrial chemicals and most homes normally have this on hand.
After Care:
After you have removed the efflorescence, you should consider putting a water-repellent or silicone coating. It is VERY important you apply these correctly because if you do not they can cause more harm than good.